mysql - MySql でグループごとに一意のレコードを数える

Question

これが私のクエリです

SELECT count(*) as count 
FROM `tbl_track` 
GROUP BY `user_id`

その結果は (1 人が 2 回訪問 + 1 人が 2 回訪問 + 1 人が 1 回訪問)

Count
2
2
1

結果が欲しい（2人来店2回＋1人来店1回）

Count
2
1

Answer 1

SELECT count(*) as `count`, `visit_times` 
FROM (
  SELECT count(*) as `visit_times` 
  FROM `tbl_track` 
  GROUP BY `user_id`
) AS t GROUP BY `visit_times`

Answer 2

これを試して：

select cnt as user_count,COUNT(*) as count
from
(
SELECT   COUNT(*) as cnt 
FROM tbl_track 
GROUP BY userid)a
group by cnt

SQL フィドルのデモ

Answer 3

これを試して：

SELECT DISTINCT VisitsCount
FROM
(
    SELECT COUNT(*) AS VisitsCount
    FROM TableName
    GROUP BY UserId
) T